Carburator problems ?
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Joined: Apr 2000
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Carburator problems ?
My 1986, F150, straight 6, maual 4 speed was not running smoothly at crusing and would surge up and down at idel. I rebuild my carbutator and my ford cruses great now but still surge up and down at idle and most of the time will shut off when I come to a stop. i have resently replace my engine. Any idears.
Elder User
Joined: Apr 2001
Posts: 772
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From: Glen Burnie Maryland
Carburator problems ?
My 1986, F150, straight 6, maual 4 speed was not running smoothly at crusing and would surge up and down at idel. I rebuild my carbutator and my ford cruses great now but still surge up and down at idle and most of the time will shut off when I come to a stop. i have resently replace my engine. Any idears.
Spray WD-40 around all gasketed areas while running and all vacuum ports, joints.
Larry
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Joined: May 2014
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From: Charlotte
It is possible that with the decrease in the ambient outside temperatures that your main carb jets may now be undersized. I recently experienced this and changed up sizes by two with grwat sucess.
I've read that carbs are calibrated to 70° @ sea level and to increase jet sizes by two for every 30° decrease in temp. That applies to Holley's and I would assume that it applies for most other carbs too.
I've read that carbs are calibrated to 70° @ sea level and to increase jet sizes by two for every 30° decrease in temp. That applies to Holley's and I would assume that it applies for most other carbs too.
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